// 实现这个项目的构建任务
const {src,dest,parallel,series,watch} = require('gulp')
const del = require('del')

const browserSync = require('browser-sync')
const loadPlugins = require('gulp-load-plugins')
const plugins = loadPlugins()
const bs = browserSync.create()
const data = {
    menus: [
      {
        name: 'Home',
        icon: 'aperture',
        link: 'index.html'
      },
      {
        name: 'Features',
        link: 'features.html'
      },
      {
        name: 'About',
        link: 'about.html'
      },
      {
        name: 'Contact',
        link: '#',
        children: [
          {
            name: 'Twitter',
            link: 'https://twitter.com/w_zce'
          },
          {
            name: 'About',
            link: 'https://weibo.com/zceme'
          },
          {
            name: 'divider'
          },
          {
            name: 'About',
            link: 'https://github.com/zce'
          }
        ]
      }
    ],
    pkg: require('./package.json'),
    date: new Date()
  }
const clean  = () =>{
    return del(['dist','temp'])
}
const style = () =>{
    return src('src/assets/styles/*.scss',{base:'src'})
        .pipe(plugins.sass({outputStyle:'expanded'}))
            .pipe(dest('temp'))
            .pipe(bs.reload({ stream: true }))
}
const script = () =>{
    return src('src/assets/scripts/*.js',{base:'src'})
        .pipe(plugins.babel({presets:['@babel/preset-env']}))
        .pipe(dest('temp'))
        .pipe(bs.reload({ stream: true }))
}
const page = () =>{
    return src('src/*.html',{base:'src'})
    .pipe(plugins.swig({data}))
    .pipe(dest('temp'))
    .pipe(bs.reload({ stream: true }))
}
const image = () =>{
    return src('src/assets/images/**',{base:'src'})
     .pipe(plugins.imagemin())
     .pipe(dest('dist'))
}
const font = () =>{
    return src('src/assets/fonts/**',{base:'src'})
     .pipe(plugins.imagemin())
     .pipe(dest('dist'))
}
const extra = () => {
    return src('public/**',{base:'public'})
    .pipe(dest('dist'))
}
const useref = () => {
    return src('temp/*.html', { base: 'temp' })
      .pipe(plugins.useref({ searchPath: ['temp', '.'] }))
      // html js css
      .pipe(plugins.if(/\.js$/, plugins.uglify()))
      .pipe(plugins.if(/\.css$/, plugins.cleanCss()))
      .pipe(plugins.if(/\.html$/, plugins.htmlmin({
        collapseWhitespace: true,
        minifyCSS: true,
        minifyJS: true
      })))
      .pipe(dest('dist'))
  }

// const useref = () => {
//     return src('dist/*.html', { base: 'dist' })
//     .pipe(plugins.useref({ searchPath: ['dist', '.'] }))
//     .pipe(dest('dist'))
// }

const serve = () =>{
    watch('src/assets/styles/*.scss',style)
    watch('src/assets/scripts/*.js', script)
    watch('src/*.html', page)
    // watch('src/assets/images/**', image)
    // watch('src/assets/fonts/**', font)
    // watch('public/**', extra)
    watch([
      'src/assets/images/**',
      'src/assets/fonts/**',
      'public/**'
    ], bs.reload)
    bs.init({
        notify:false,
        port:2080,
        // open:false,
        // files:'dist/**',
        server:{
            baseDir:['temp','src','public'],
            routes:{
                '/node_modules': 'node_modules'
            }
        }
    })
}
const compile = parallel(style,script,page)
    
const build = series(clean,parallel(series(compile,useref ) ,image,font,extra)) 
const develop = series(compile,serve)
module.exports = {
    clean,
   
    build,
   
    develop
 
}
